Blender Disabling Windows Aero?
I had the same issue. I created an account to say that the above fix worked with a similar PC build: using windows 7 and a 980. Rolled back to Nvidia 368.81 driver.

http://us.download.nvidia.com/Windows/368.81/368.81-desktop-win8-win7-winvista-64bit-international-whql.exe